The Legend of Hilaria is a Coptic romance, possibly a Christian version of the pagan Tale of Bentresh. It was written between the 6th and 9th centuries AD. During the Middle Ages, it was translated into Syriac, Arabic and Ethiopic. It tells the tale of Hilaria, daughter of the Roman emperor Zeno, who disguised herself as a man to become a monk and later heals her sister of an ailment. The tale was incorporated into the synaxaries of the Oriental Orthodox churches, and Hilaria came to be celebrated as a saint.

Judging by its lack of historical truth regarding Zeno, his family and his reign, it is likely that the Legend was written no earlier than about AD 500.^[1] It had achieved a final form by 848, the date of the only complete Coptic manuscript.^[2] The Syriac translation likewise dates to the 9th century.^[1]

The text is presented as written by the abbot Pambo, who also plays a part in the story. The abbot is in fact a fictional character based on the 4th-century Saint Pambo. The author of the Legend is therefore anonymous.^[3]

There is only one complete Coptic manuscript on parchment, now Pierpont Morgan M.583.^[2] It is a dated hagiographic miscellany that was completed on 8 February 848.^[4] There are a further four fragmentary manuscript copies, three on parchment and one on papyrus. One fragment contains a shorter version of the story, but it does not appear to be an older version. All the surviving Coptic manuscripts are in the Sahidic dialect.^[2]

During the Middle Ages, the Legend was translated into Syriac, Arabic and Ethiopic.^[3] The Syriac translation is the earliest, dating to the 9th century.^[1] There are six manuscripts of the Syriac text, showing little variation.^[5] The earliest surviving copy of an Arabic version is from the 13th or 14th century.^[6] There are four different Arabic versions. The long Arabic script version, from the Copto-Arabic Synaxary, is a translation of the Coptic. There is a short version that is an abridgement of this, although it also diverges in some details. There is also a short translation from the Coptic that is known from a single manuscript copied in Garshuni (that is, Arabic in Syriac script). This was the earliest version known in Europe. A longer Garshuni version translated from the Syriac is known from at least five manuscripts, in one of which it is titled History of the Emperor Zeno.^[7] The Ethiopic version is a translation of the long Arabic and preserved in the Ethiopian Synaxary.^[8]

No Greek version is known.^[3]

The Legend is a work of fiction, usually considered a romance or novel.^[9][10] Although it refers to historical figures, the Legend is "demonstrably ahistorical".^[11] Zeno is not known to have had a daughter.^[12] From the prologue, it appears that the author was "aware of the literary genre that he [was] tackling", that "God had provided believers not only with preachers but also with authors, intended for their guidance."^[3]

Oscar Lemm first proposed that the Legend of Hilaria was based on the Neo-Middle Egyptian Tale of Bentresh, which dates from perhaps as early as the Kushite 25th Dynasty in the 8th century BC or as late as the Ptolemaic Dynasty.^[1][12] There are, however, major differences between the two stories. Parallels exist between Hilaria and figures known from Greek hagiography, such as Eugenia Pelagia, Euphrosyne and Apolinaria.^[3]

Despite her purely legendary origins, Hilaria was later recognized as a saint in the liturgical calendar of the eastern churches. Her feast day in the Coptic church is 21 Tobi, which is also the Feast of the Dormition.^[3] In the Ethiopian calendar, it falls on the 21st of the month of Ter.^[18] In the Syriac Orthodox Church, it falls on 27 November or 13 January.^[12]

The Legend is a monophysite work, which explains its positive portrayal of Zeno, who issued the pro-monophysite Henoticon in 482.^[3]